.ul {
  position: absolute;
  width: 100%;
  height: 50px;
  background-color: aquamarine;
  bottom: 0;
  left: 0;
  display: flex;
}

.ul li {
  flex: 1;
  font-size: 14px;
  list-style: none;
}

.ul li a {
  text-decoration: none;
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

.ul li .active {
  color: red;
}

